Onyx Coffee Old FashionedFrom Imbibe Magazine·View original →rocksIngredientsFractions4 ozcold-brew coffee ½ oz. demerara syrup (1:1)2 dasheschocolate bittersPreparation1.Combine all of the ingredients in a glass and stir to combine. Add a single large ice cube and briefly stir to chill; garnish.Suggest a correction